官网：https://grafana.com/grafana/plugins/grafana-piechart-panel/?tab=installation
使用grafana-cli直接安装
[root@test1 plugins]# grafana-cli plugins install grafana-piechart-panel
installing grafana-piechart-panel @ 1.6.2
from: https://grafana.com/api/plugins/grafana-piechart-panel/versions/1.6.2/download
into: /var/lib/grafana/plugins
✔ Installed grafana-piechart-panel successfully
Restart grafana after installing plugins . <service grafana-server restart>
该插件将安装到 grafana 插件目录中；默认为 /var/lib/grafana/plugins
安装完后重启grafana，即可使用
